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| author | Heiner Kallweit <hkallweit1@gmail.com> | 2024-02-02 08:02:19 +0100 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@kernel.org> | 2024-02-08 18:06:45 +0100 |
| commit | 03f9863b1afa37779e82b18999a5e16aa759a397 (patch) | |
| tree | 24490ebee33e5c78c7756914bfa2159262d784fc /drivers/i2c/busses | |
| parent | ea4f32970b69aa0eb3c74ae23662f97366bf6968 (diff) | |
| download | linux-03f9863b1afa37779e82b18999a5e16aa759a397.tar.gz | |
i2c: i801: Add helper i801_check_and_clear_pec_error
Avoid code duplication and factor out checking and clearing PEC error
bit to new helper i801_check_and_clear_pec_error().
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-i801.c | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index 44ae6326d88c22..156bace92ad3ba 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -328,11 +328,27 @@ MODULE_PARM_DESC(disable_features, "Disable selected driver features:\n" "\t\t 0x10 don't use interrupts\n" "\t\t 0x20 disable SMBus Host Notify "); +static int i801_check_and_clear_pec_error(struct i801_priv *priv) +{ + u8 status; + + if (!(priv->features & FEATURE_SMBUS_PEC)) + return 0; + + status = inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE; + if (status) { + outb_p(status, SMBAUXSTS(priv)); + return -EBADMSG; + } + + return 0; +} + /* Make sure the SMBus host is ready to start transmitting. Return 0 if it is, -EBUSY if it is not. */ static int i801_check_pre(struct i801_priv *priv) { - int status; + int status, result; status = inb_p(SMBHSTSTS(priv)); if (status & SMBHSTSTS_HOST_BUSY) { @@ -353,13 +369,9 @@ static int i801_check_pre(struct i801_priv *priv) * the hardware was already in this state when the driver * started. */ - if (priv->features & FEATURE_SMBUS_PEC) { - status = inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE; - if (status) { - pci_dbg(priv->pci_dev, "Clearing aux status flags (%02x)\n", status); - outb_p(status, SMBAUXSTS(priv)); - } - } + result = i801_check_and_clear_pec_error(priv); + if (result) + pci_dbg(priv->pci_dev, "Clearing aux status flag CRCE\n"); return 0; } @@ -408,14 +420,12 @@ static int i801_check_post(struct i801_priv *priv, int status) * bit is harmless as long as it's cleared before * the next operation. */ - if ((priv->features & FEATURE_SMBUS_PEC) && - (inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE)) { - outb_p(SMBAUXSTS_CRCE, SMBAUXSTS(priv)); - result = -EBADMSG; - dev_dbg(&priv->pci_dev->dev, "PEC error\n"); + result = i801_check_and_clear_pec_error(priv); + if (result) { + pci_dbg(priv->pci_dev, "PEC error\n"); } else { result = -ENXIO; - dev_dbg(&priv->pci_dev->dev, "No response\n"); + pci_dbg(priv->pci_dev, "No response\n"); } } if (status & SMBHSTSTS_BUS_ERR) { |